Contents of P2O5, Corg, Sr, and Ba in phosphorites and host sediments from the Atlantic and Pacific oceans

Sr contents in phosphorites on shelves of the Southwest Africa, and of Chile and Peru increase with degree of their lithification, from 0.05 to 0.28% and from 0.13 to 0.16% respectively. Phosphorites from Pacific submarine seamounts have the average Sr content 0.11%, and bone phosphate from Pacific...

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Bibliographic Details
Main Author: Tambiev, Sergey B
Format: Dataset
Language:English
Published: PANGAEA 1979
Subjects:
AK4-250
Akademik Kurchatov
AKU4
Archive of Ocean Data
ARCOD
Atlantic Ocean
Central Pacific
Chile shelf
DM8
DM8-546
DM8-553
Dmitry Mendeleev
Dredge
DRG
Grab
Manihiki Plateau
Pacific Ocean
Marcus-Necker Ridge
Mikhail Lomonosov
ML26
ML26_2046
ML26_2047
ML26_2048
Peru shelf
TAM-160
TRAWL
Trawl net
VITYAZ
Vityaz (ex-Mars)
Vityaz-48
VITYAZ6261-1
VITYAZ6265
VITYAZ6266-DR
VITYAZ6333-13-TR
VITYAZ6343-DR
VITYAZ6348-1
VITYAZ6349
VITYAZ6352-DR
VITYAZ6364-DR
VITYAZ6366-DR
VITYAZ6367-DR
VITYAZ6368-DR
Pacific
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.755309
https://doi.org/10.1594/PANGAEA.755309
Description
Summary:Sr contents in phosphorites on shelves of the Southwest Africa, and of Chile and Peru increase with degree of their lithification, from 0.05 to 0.28% and from 0.13 to 0.16% respectively. Phosphorites from Pacific submarine seamounts have the average Sr content 0.11%, and bone phosphate from Pacific floor 0.13%. Shelf phosphorites are characterized by high correlation coefficients between Sr and P2O5 (R = +0.82) and constant Sr/P2O5 ratio (0.0084). In phosphorites from submarine sea-mounts and in bones from the ocean floor Sr/P2O5 ratio is only a little higher than a half of that in shelf phosphorites. This indicates specific and different genesis of phosphorites from submarine mountains. Ba content in recent phosphorites from the shelf of the Southwest Africa changes with increasing degree of lithification. At first their Ba contents rise from 0.031 to 0.188%, then they diminish to 0.016%, and thereafter again increase to 0.070%. This is due to successive predominance of one of the following processes going in different directions: co-precipitation with phosphate gels or formation of true separate Ba phase, loss of phosphate in crystallization and "self-purification" of concentrations, and surface adsorption. In Peru-Chile shelf phosphorites the average Ba content is 0.017%, in phosphorites from Pacific seamounts 0.192%, and in fossilized bones 0.010%.

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